Anatomy and Cell Biology 3309 Lecture Notes - Lecture 14: Ventral Root Of Spinal Nerve, Dorsal Root Of Spinal Nerve, Peripheral Nervous System
5 Apr 2018
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Divided into many sections: cervical, thoracic, lumbar, sacral. Segmentation of the spinal cord is according to where it"s nerves leave the vertebrae column in order thoracic) and then continues as a bundle of nerves to go to other parts of the body. The spinal cord is embedded and protected by the vertebrae. There is bone all around, and the spinal cord in the middle. Just like how the brain is protected by the skull. The spinal cord is the solid mass part of the cns: spinal cord gives rise to all these nerves that travel into the periphery of the body and form the peripheral nervous system. Spinal cord = cns: as soon as nerves leave the spinal cord, they become part of the pns. Ganglia part of the pns: they are thickening of the nerves at the spinal cord, e. g. Spinal cord is a solid mass with dorsal roots and ventral roots wrapped into the meninges.
